Gnarled Carrots
In the Brooder
One of my chickens has a particularly weird comb (double rows of small spikes, much like a Carnation or a Buttercup, but much shorter like a Pea Comb). This got me wondering about what genes might be in the mix.
A long way down the rabbit hole later!! there are a couple things about comb types that I'm not quite sure about.
From my understanding, there are 4 genes that control comb type:
Dominant Pea Comb, (P/P , r+/r+) or (P/p+ , r+/r+), creates a Pea Comb.
Dominant Rose Comb, (p+/p+ , R/R) or (p+/p+ , R/r+), creates a Rose Comb.
Any other combination of Pea and Rose Comb genes creates a Walnut Comb.
The addition of Duplex Comb, (Dv), creates a V comb.
The addition of Duplex Comb, (Dc), creates a cup-shaped comb.
The addition of Breda, (Bd+), creates combless or very small combs.
From my understanding, there are also 10 basic comb types:
What I'm confused on is what the base genes for other comb types are supposed to be (obviously, weird combinations of genes sometimes create combs that look similar for different reasons and heterozygous forms of each comb type aren't 100%). I've marked the ones that I'm not exactly sure about.
A long way down the rabbit hole later!! there are a couple things about comb types that I'm not quite sure about.
From my understanding, there are 4 genes that control comb type:
- Pea Comb, P, p+
- Rose Comb, R r+
- Duplex Comb, d+, Dv, Dc
- Breda, Bd+, bd
Dominant Pea Comb, (P/P , r+/r+) or (P/p+ , r+/r+), creates a Pea Comb.
Dominant Rose Comb, (p+/p+ , R/R) or (p+/p+ , R/r+), creates a Rose Comb.
Any other combination of Pea and Rose Comb genes creates a Walnut Comb.
The addition of Duplex Comb, (Dv), creates a V comb.
The addition of Duplex Comb, (Dc), creates a cup-shaped comb.
The addition of Breda, (Bd+), creates combless or very small combs.
From my understanding, there are also 10 basic comb types:
- Single Comb: (p+/p+ , r+/r+ , d+/d+ , Bd+/Bd+)
- Rose Comb: (p+/p+ , R/R , d+/d+ , Bd+/Bd+) or (p+/p+ , R/r+ , d+/d+ , Bd+/Bd+)
- Pea Comb: (P/P , r+/r+ , d+/d+ , Bd+/Bd+) or (P/p+ , r+/r+ , d+/d+ , Bd+/Bd+)
- Walnut Comb: (any combination of Pea Comb genes that doesn't create a Pea Comb , any combination of Rose Comb genes that doesn't create a Rose Comb , d+/d+ , Bd+/Bd+)
- Cushion Comb: (P/P , R/R , d+/d+ , Bd+/Bd+) or (P/p+ , R/r+ , d+/d+ , Bd+/Bd+)
- Strawberry Comb: (P/??? , R/??? , d+/d+ , Bd+/Bd+)
- V Comb: (r+/??? , p+/??? , Dv/Dv , Bd+/Bd+) or (r+/??? , p+/??? , Dv/d+ , Bd+/Bd+)
- Carnation Comb: (r+/r+??? , p+/p+??? , Dv/Dv , Bd+/Bd+) or (r+/r+??? , p+/p+??? , Dv/d+ , Bd/+Bd+)
- Buttercup Comb: (r+/r+??? , p+/p+??? , Dc/Dc , Bd+/Bd+) or (r+/r+??? , p+/p+??? , Dc/d+ , Bd+/Bd+)
- Breda Comb: (any combination of Pea Comb genes , any combination of Rose Comb genes , any combination of Duplex Comb genes , bd/bd)
What I'm confused on is what the base genes for other comb types are supposed to be (obviously, weird combinations of genes sometimes create combs that look similar for different reasons and heterozygous forms of each comb type aren't 100%). I've marked the ones that I'm not exactly sure about.